CN102921925A - Method for reducing pouring temperature of iron-based surface composite material - Google Patents
Method for reducing pouring temperature of iron-based surface composite material Download PDFInfo
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- CN102921925A CN102921925A CN2012104198652A CN201210419865A CN102921925A CN 102921925 A CN102921925 A CN 102921925A CN 2012104198652 A CN2012104198652 A CN 2012104198652A CN 201210419865 A CN201210419865 A CN 201210419865A CN 102921925 A CN102921925 A CN 102921925A
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Abstract
The invention relates to an iron-based composite material and especially relates to a method for reducing pouring temperature of iron-based surface composite material through heat release of thermit reaction, wherein the principle is as follows: triggering the thermit reaction by heating molten iron, counteracting the cooling effect of a ceramic particle pre-forming block on the molten iron through the heat release part of the thermit reaction, and simultaneously forming an alloy having the ingredients the same as that of a high-chromium iron substrate through the thermit reaction; in order to generate no effect on the distribution of the ceramic reinforcement particles and improve the wearing resistance of the hexagonal prism hole or honeycomb hole part, the reactant of the thermit reaction is processed to a cylindrical shape and is added in the hexagonal prism hole or honeycomb hole of the ceramic particle pre-forming block, the reactant powder is mixed and is pressed to the cylindrical shape so as to conveniently process and apply the cylindrical reactant, and the reactant powder is wrapped by an aluminum foil to prevent the cylinder from being broken and prevent the reactant powder from dropping.
Description
Technical field
The present invention relates to iron base composite material, particularly for relating to a kind of method of utilizing the thermit reaction heat release to reduce the Fe-base surface compound material pouring temperature.
Technical background
Rich chromium cast iron has excellent anti-wear performance, be widely used in the wear parts such as grinding roller, liner plate, bar in industries such as cement, electric power, but under the abominable wearing and tearing such as high hard abrasive material, HI high impact industrial and mineral, high-chromium cast iron piece lost efficacy rapidly, still can not satisfy user's requirement; For this reason, the better particle of wearability strengthens Fe-base surface compound material and has caused that more and more researchers and the producer pay close attention to, studies show that, the melt infiltration method is to prepare at present one of only technique of Fe-base surface compound material, but, because reinforcing material and preparation technology's restriction, the thickness of Fe-base surface compound material composite bed often is no more than 10mm, is difficult to satisfy workpiece to the requirement of wearing layer thickness in a lot of situations.
Patent CN102310183A discloses a kind of high wear resisting iron-based composite material and preparation method thereof, and the preparation method comprises the steps: 1) select large scale electric smelting fused alumina zirconia particle; 2) above-mentioned AZS particle is made fused alumina zirconia particulate ceramic piece, cool off stand-by; 3) technology of infiltration casting is carried out at the top that the fused alumina zirconia particulate ceramic piece of above-mentioned gained is placed on the resin bonded sand mould die cavity, the pickup of unpacking; 4) the fused alumina zirconia particle enhancing iron base composite material of above-mentioned gained is heat-treated, this inventive method simple process, composite bed thickness can be regulated in a big way; Also having the researcher to propose, is the ZTA(ZrO of 1 ~ 3 mm with particle diameter
2Toughness reinforcing Al
2O
3) ceramic particle is made into cellular porous ceramic performs, then pours into a mould the casting of rich chromium cast iron molten metal and oozes ceramic performs, successfully prepare ceramic particle and strengthened rich chromium cast iron based composites (casting, 2012,61 (2): 165.); But the pouring temperature of the above-mentioned two kinds of methods all common pouring temperature than rich chromium cast iron workpiece is high, and the former is 1540 ~ 1590 ℃, and the latter also reaches 1450 ~ 1500 ℃; In these casting permeating methods, because the cooling effect of ceramic particle preformed piece, be difficult under lower pouring temperature, realize compound, and higher pouring temperature makes properties of high Cr white cast iron descend on the one hand, also smelting equipment is had higher requirement simultaneously, although being carried out preheating, sand mold can to a certain degree improve composite effect, large to the difficulty of sand mold preheating, and effect is also not obvious; Therefore, in the urgent need to taking effective ways, under the prerequisite that guarantees composite effect, reduce the rich chromium cast iron pouring temperature.
Summary of the invention
The present invention proposes a kind of method that particle strengthens the Fe-base surface compound material pouring temperature that reduces, its principle is: the heat effect by molten iron triggers thermit reaction, utilize thermit reaction heat release partial offset ceramic particle preformed piece to the cooling effect of molten iron, form the alloy identical with the rich chromium cast iron matrix composition by thermit reaction simultaneously; Strengthen the distribution of particle in order not affect pottery, and improve the wearability of six prismatic holes or honeycomb hole part, the reactant of thermit reaction is made in the cylindric six prismatic holes or honeycomb hole that join ceramic particle preformed piece, convenience for cylindric reactant Production and application, the rear pressure of reactant powder mixing is formed cylindric, then adopts aluminium foil to wrap up preventing that cylinder fragmentation and reactant powder from coming off.
The present invention proposes a kind of method that particle strengthens the Fe-base surface compound material pouring temperature that reduces, and it is characterized in that: with Fe
2O
3Powder, Cr
2O
3Powder, Al powder mix in proportion, and pressure is formed cylindric, and carry out preheating with the aluminium foil parcel, then the column reactant is fixed on the position of appointment in the sandbox, put into ceramic particle preformed piece, pour into a mould after the mould assembling, cooling obtains particle and strengthens Fe-base surface compound material.
Related mixes by a certain percentage, refers to Fe
2O
3Powder, Cr
2O
3Powder, Al the powder in mass ratio ratio of 15 ~ 21:5 ~ 9:10 adopt ball grinding method to mix until evenly.
Related pressure is formed cylindric, refers to that pressure at 50 ~ 100MPa presses down that to form diameter be 5 ~ 8mm, and Length Ratio is wanted the cylinder of the compound large 3 ~ 5mm of ceramic particle preformed piece thickness.
Related preheating refers to cylindric reactant at 150 ~ 200 ℃ of heating 30 ~ 40min.
The related position that is fixed on appointment in the sandbox refers to adopt bonding, insertion or built-in process that cylindric reactant is fixed on the inner wall of sand box.
Related ceramic particle preformed piece refers to adopt conventional binding agent adhesive method by AZS particle or ZrO
2Toughness reinforcing Al
2O
3The preformed piece with six prismatic holes that particle is made, the interior section circular diameter in its six prismatic hole is than the large 2 ~ 3mm of diameter of cylindric reactant, its six prismatic hole is corresponding with the position of cylindric reactant when assembling in die cavity, corresponding cylindric reactant unit, every hole.
Pour into a mould after the related mould assembling, refer to adopt 1390 ~ 1430 ℃ molten iron cast after the mould assembling, cylindric reactant addition is larger, and the pouring temperature of employing is lower.
The method that the present invention proposes has improved the performance of material when effectively reducing pouring temperature, cost is low, and is easy and simple to handle, can also be applied to the steel-based composite surface material that other adopts cast-infiltration method preparation.
Description of drawings
Fig. 1 is the photo that the particle of 1390 ℃ of cast acquisitions strengthens Fe-base surface compound material, and 1 is the AZS particle among the figure, and 2 is the rich chromium cast iron matrix.
Specific embodiment
The present invention can implement according to following instance, but be not limited to following instance, employed term in the present invention, unless other explanation is arranged, generally have the implication that those of ordinary skills understand usually, should understand, these embodiment just in order to demonstrate the invention, but not limit the scope of the invention by any way, in following embodiment, various processes and the method do not described in detail are conventional methods as known in the art.
A kind of method that reduces particle enhancing Fe-base surface compound material pouring temperature of present embodiment implementation, the surface recombination layer thickness of the iron base composite material that prepare is 30mm, detailed process is: with Fe
2O
3Powder, Cr
2O
3Powder, the Al powder in mass ratio ratio of 15:5:10 adopts ball grinding method to mix until evenly, then press down at the pressure of 50MPa that to form diameter be 5mm, the cylinder of length 33mm, wrap up laggard row at 150 ℃ of heating 40min with aluminium foil, then the column reactant is adopted adhesive method to be fixed in the sandbox on the inwall, and put into the ceramic particle preformed piece with six prismatic holes that adopts conventional binding agent adhesive method to be made by the AZS particle, the interior section circular diameter in six prismatic holes is 7mm, its six prismatic hole is corresponding with the position of cylindric reactant, corresponding cylindric reactant unit, every hole, adopt 1390 ℃ rich chromium cast iron molten iron cast after the mould assembling, cooling obtains particle and strengthens Fe-base surface compound material, Fig. 1 is the photo that prepared particle strengthens Fe-base surface compound material, 1 is the AZS particle among the figure, and 2 is the rich chromium cast iron matrix.
A kind of method that reduces particle enhancing Fe-base surface compound material pouring temperature of present embodiment implementation, the surface recombination layer thickness of the iron base composite material that prepare is 40mm, detailed process is: with Fe
2O
3Powder, Cr
2O
3Powder, the Al powder in mass ratio ratio of 21:9:10 adopts ball grinding method to mix until evenly, then press down at the pressure of 100MPa that to form diameter be 8mm, the cylinder of length 45mm, wrap up laggard row at 200 ℃ of heating 40min with aluminium foil, then the column reactant is adopted insertion method to be fixed in the sandbox on the inwall, and put into the ceramic particle preformed piece with six prismatic holes that adopts conventional binding agent adhesive method to be made by the AZS particle, the interior section circular diameter in six prismatic holes is 11mm, its six prismatic hole is corresponding with the position of cylindric reactant, corresponding cylindric reactant unit, every hole, adopt 1430 ℃ rich chromium cast iron molten iron cast after the mould assembling, cooling obtains particle and strengthens Fe-base surface compound material.
Embodiment 3
A kind of method that reduces particle enhancing Fe-base surface compound material pouring temperature of present embodiment implementation, the surface recombination layer thickness of the iron base composite material that prepare is 35mm, detailed process is: with Fe
2O
3Powder, Cr
2O
3Powder, Al the powder in mass ratio ratio of 18:7:10 adopt ball grinding method to mix until evenly, then press down at the pressure of 80MPa that to form diameter be 7mm, the cylinder of length 39mm, wrap up laggard row at 180 ℃ of heating 35min with aluminium foil, then the column reactant is adopted insertion method to be fixed in the sandbox on the inwall, and put into and adopt conventional binding agent adhesive method by ZrO
2Toughness reinforcing Al
2O
3The ceramic particle preformed piece with six prismatic holes that particle is made, the interior section circular diameter in six prismatic holes is 9mm, its six prismatic hole is corresponding with the position of cylindric reactant, corresponding cylindric reactant unit, every hole, adopt 1410 ℃ rich chromium cast iron molten iron cast after the mould assembling, cooling obtains particle and strengthens Fe-base surface compound material.
Embodiment 4
A kind of method that reduces particle enhancing Fe-base surface compound material pouring temperature of present embodiment implementation, the surface recombination layer thickness of the iron base composite material that prepare is 30mm, detailed process is: with Fe
2O
3Powder, Cr
2O
3Powder, Al the powder in mass ratio ratio of 19:8:10 adopt ball grinding method to mix until evenly, then press down at the pressure of 70MPa that to form diameter be 6mm, the cylinder of length 34mm, wrap up laggard row at 200 ℃ of heating 30min with aluminium foil, then the column reactant is adopted built-in process to be fixed in the sandbox on the inwall, and put into and adopt conventional binding agent adhesive method by ZrO
2Toughness reinforcing Al
2O
3The ceramic particle preformed piece with six prismatic holes that particle is made, the interior section circular diameter in six prismatic holes is 8mm, its six prismatic hole is corresponding with the position of cylindric reactant, corresponding cylindric reactant unit, every hole, adopt 1400 ℃ rich chromium cast iron molten iron cast after the mould assembling, cooling obtains particle and strengthens Fe-base surface compound material.
Embodiment 5
A kind of method that reduces particle enhancing Fe-base surface compound material pouring temperature of present embodiment implementation, the surface recombination thickness of the iron base composite material that prepare is 38mm, detailed process is: with Fe
2O
3Powder, Cr
2O
3Powder, the Al powder in mass ratio ratio of 19:7:10 adopts ball grinding method to mix until evenly, then press down at the pressure of 80MPa that to form diameter be 7mm, the cylinder of length 42mm, wrap up laggard row at 180 ℃ of heating 35min with aluminium foil, then the column reactant is adopted built-in process to be fixed in the sandbox on the inwall, and put into the ceramic particle preformed piece with six prismatic holes that adopts conventional binding agent adhesive method to be made by the AZS particle, the interior section circular diameter in six prismatic holes is 10mm, its six prismatic hole is corresponding with the position of cylindric reactant, corresponding cylindric reactant unit, every hole, adopt 1420 ℃ rich chromium cast iron molten iron cast after the mould assembling, cooling obtains particle and strengthens Fe-base surface compound material.
Claims (7)
1. a method that reduces the Fe-base surface compound material pouring temperature is characterized in that: with Fe
2O
3Powder, Cr
2O
3Powder, Al powder mix in proportion, and pressure is formed cylindric, and carry out preheating with the aluminium foil parcel, then the column reactant is fixed on the position of appointment in the sandbox, put into ceramic particle preformed piece, pour into a mould after the mould assembling, cooling obtains particle and strengthens Fe-base surface compound material.
2. a kind of method that reduces the Fe-base surface compound material pouring temperature as claimed in claim 1, it is characterized in that: described mixing in proportion refers to Fe
2O
3Powder, Cr
2O
3Powder, Al the powder in mass ratio ratio of 15 ~ 21:5 ~ 9:10 adopt ball grinding method to mix until evenly.
3. a kind of method that reduces the Fe-base surface compound material pouring temperature as claimed in claim 1, it is characterized in that: described pressure is formed cylindric, refer to that pressure at 50 ~ 100MPa presses down that to form diameter be 5 ~ 8mm, Length Ratio is wanted the cylinder of the compound large 3 ~ 5mm of ceramic particle preformed piece thickness.
4. a kind of method that reduces the Fe-base surface compound material pouring temperature as claimed in claim 1 is characterized in that: described preheating refers to cylindric reactant at 150 ~ 200 ℃ of heating 30 ~ 40min.
5. a kind of method that reduces the Fe-base surface compound material pouring temperature as claimed in claim 1, it is characterized in that: the described position that is fixed on appointment in the sandbox refers to adopt bonding, insertion or built-in process that cylindric reactant is fixed on the inner wall of sand box.
6. a kind of method that reduces the Fe-base surface compound material pouring temperature as claimed in claim 1 is characterized in that: described ceramic particle preformed piece refers to adopt conventional binding agent adhesive method by AZS particle or ZrO
2Toughness reinforcing Al
2O
3The preformed piece with six prismatic holes that particle is made, the interior section circular diameter in its six prismatic hole is than the large 2 ~ 3mm of diameter of cylindric reactant, its six prismatic hole is corresponding with the position of cylindric reactant when assembling in die cavity, corresponding cylindric reactant unit, every hole.
7. a kind of method that reduces the Fe-base surface compound material pouring temperature as claimed in claim 1, it is characterized in that: pour into a mould after the described mould assembling, refer to adopt 1390 ~ 1430 ℃ molten iron cast after the mould assembling, cylindric reactant addition is larger, and the pouring temperature of employing is lower.
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| CN201210419865.2A CN102921925B (en) | 2012-10-29 | 2012-10-29 | Method for reducing pouring temperature of iron-based surface composite material |
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| CN201210419865.2A CN102921925B (en) | 2012-10-29 | 2012-10-29 | Method for reducing pouring temperature of iron-based surface composite material |
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| CN102921925B CN102921925B (en) | 2015-06-10 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104658920A (en) * | 2015-02-04 | 2015-05-27 | 湖南浩威特科技发展有限公司 | Preparation method for aluminum silicon carbide, aluminum silicon carbide obtained with method and electronic component packaging substrate |
| CN104999053A (en) * | 2015-08-04 | 2015-10-28 | 东南大学 | Ferric-oxide-containing paint used for aluminum alloy cast-infiltration, and method for manufacturing cast-infiltration coating by using same |
| CN106378239A (en) * | 2016-09-12 | 2017-02-08 | 山东科技大学 | Ball mill liner with rhombus abrasion-resistant grating and preparation method of ball mill liner |
| CN108380850A (en) * | 2018-03-28 | 2018-08-10 | 昆明理工大学 | A kind of wear-resisting rake teeth tooth head of ceramic particle multi-scale enhancement metal-based compound and preparation method thereof |
| CN109127734A (en) * | 2018-09-06 | 2019-01-04 | 湖南三泰新材料股份有限公司 | Roll sleeve, the manufacturing method of roll sleeve and roll |
| CN110076323A (en) * | 2019-05-06 | 2019-08-02 | 安徽同创电力科技有限公司 | A kind of preparation method of medium-speed coal mill roller roller set |
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| CN112844638A (en) * | 2020-12-31 | 2021-05-28 | 松山湖材料实验室 | Prefabricated body and preparation method thereof, and wear-resistant part and preparation method thereof |
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| CN109127734B (en) * | 2018-09-06 | 2020-05-22 | 湖南三泰新材料股份有限公司 | Roll sleeve, method for producing roll sleeve, and roll |
| CN110076323A (en) * | 2019-05-06 | 2019-08-02 | 安徽同创电力科技有限公司 | A kind of preparation method of medium-speed coal mill roller roller set |
| CN111730042A (en) * | 2020-07-01 | 2020-10-02 | 吕新起 | Preparation method of ceramic particle reinforced steel-based composite material based on SHS technology |
| CN112844638A (en) * | 2020-12-31 | 2021-05-28 | 松山湖材料实验室 | Prefabricated body and preparation method thereof, and wear-resistant part and preparation method thereof |
| CN112844638B (en) * | 2020-12-31 | 2023-05-30 | 松山湖材料实验室 | Preform and preparation method thereof, and wear-resistant part and preparation method thereof |
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Effective date of registration: 20171115 Address after: 225714 Xinghua City, Jiangsu Province, Chen Bao town land building Patentee after: Xinghua precision casting and Forging Industry Research Institute Co Ltd Address before: Zhenjiang City, Jiangsu Province, 212013 Jingkou District Road No. 301 Patentee before: Jiangsu University |
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